Electronic Components Datasheet Search |
|
HSMS-282N-TR2 Datasheet(PDF) 8 Page - Agilent(Hewlett-Packard) |
|
HSMS-282N-TR2 Datasheet(HTML) 8 Page - Agilent(Hewlett-Packard) |
8 / 14 page 8 lower cost solution is available[4]. Illustrated schematically in Figure 19, this circuit uses diode D2 and its associated passive components to cancel all even order harmonics at the detector’s RF input. Diodes D3 and D4 provide temperature compensa- tion as described above. All four diodes are contained in a single HSMS- 282R package, as illus- trated in the layout shown in Figure 20. RF in D1 R1 V+ R2 D3 C1 V– R4 D4 C1 = C2 ≈ 100 pF R1 = R2 = R3 = R4 = 4.7 K Ω D1 & D2 & D3 & D4 = HSMS-282R C2 D2 68 Ω R3 Figure 19. Schematic of Suppressed Harmonic Detector. HSMS-282R 4.7 K Ω 4.7 K Ω 100 pF 100 pF 68 Ω V– RF in V+ Figure 20. Layout of Suppressed Harmonic Detector. Note that the forgoing discussion refers to the output voltage being extracted at point V+ with respect to ground. If a differential output is taken at V+ with respect to V-, the circuit acts as a voltage doubler. Mixer applications The HSMS-282x family, with its wide variety of packaging, can be used to make excellent mixers at frequencies up to 6 GHz. The HSMS-2827 ring quad of matched diodes (in the SOT-143 package) has been designed for double balanced mixers. The smaller (SOT-363) HSMS-282R ring quad can similarly be used, if the quad is closed with external connections as shown in Figure 21. HSMS-282R IF out RF in LO in Figure 21. Double Balanced Mixer. Both of these networks require a crossover or a three dimensional circuit. A planar mixer can be made using the SOT-143 cross- over quad, HSMS-2829, as shown in Figure 22. In this product, a special lead frame permits the crossover to be placed inside the plastic package itself, eliminating the need for via holes (or other measures) in the RF portion of the circuit itself. HSMS-2829 IF out RF in LO in Figure 22. Planar Double Balanced Mixer. A review of Figure 21 may lead to the question as to why the HSMS-282R ring quad is open on the ends. Distortion in double balanced mixers can be reduced if LO drive is increased, up to the point where the Schottky diodes are driven into saturation. Above this point, increased LO drive will not result in improvements in distortion. The use of expensive high barrier diodes (such as those fabricated on GaAs) can take advantage of higher LO drive power, but a lower cost solution is to use a eight (or twelve) diode ring quad. The open design of the HSMS-282R permits this to easily be done, as shown in Figure 23. HSMS-282R IF out RF in LO in Figure 23. Low Distortion Double Balanced Mixer. This same technique can be used in the single-balanced mixer. Figure 24 shows such a mixer, with two diodes in each spot normally occupied by one. This mixer, with a sufficiently high LO drive level, will display low distortion. HSMS-282R 180 ° hybrid IF out LO in RF in Low pass filter Figure 24. Low Distortion Balanced Mixer. [4] Alan Rixon and Raymond W. Waugh, “A Suppressed Harmonic Power Detector for Dual Band ‘Phones,” to be published. 88759/02-5.PM6.0J 2001.04.25, 6:41 PM Page 8 Adobe PageMaker 6.0J/PPC |
Similar Part No. - HSMS-282N-TR2 |
|
Similar Description - HSMS-282N-TR2 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |